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Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
| Years | Make | Model | Trim | ||
|---|---|---|---|---|---|
| 1995 - 1996 | AM General | Hummer | Base | ||
| 1980 - 1985 | Avanti | II | Base | ||
| 1985 - 1985 | Avanti | II | GT | ||
| 1987 - 1991 | Avanti | II | Base | ||
| 1980 - 1981 | Buick | Century | Limited | ||
| 1980 - 1981 | Buick | Century | Estate | ||
| 1980 - 1981 | Buick | Century | Base | ||
| 1981 - 1981 | Buick | Century | Sport | ||
| 1991 - 1996 | Buick | Commercial Chassis | Base | ||
| 1980 - 1984 | Buick | Electra | Park Avenue | ||
| 1980 - 1984 | Buick | Electra | Limited | ||
| 1980 - 1989 | Buick | Electra | Estate Wagon | ||
| 1980 - 1983 | Buick | Estate Wagon | Base | ||
| 1980 - 1985 | Buick | LeSabre | Limited | ||
| 1980 - 1981 | Buick | LeSabre | Base | ||
| 1981 - 1981 | Buick | LeSabre | Sport | ||
| 1982 - 1982 | Buick | LeSabre | Limited Edition F/E | ||
| 1982 - 1985 | Buick | LeSabre | Custom | ||
| 1985 - 1990 | Buick | LeSabre | Estate Wagon | ||
| 1980 - 1981 | Buick | Regal | Limited | ||
| 1980 - 1981 | Buick | Regal | Base | ||
| 1986 - 1987 | Buick | Regal | Limited | ||
| 1986 - 1987 | Buick | Regal | Base | ||
| 1980 - 1980 | Buick | Riviera | S | ||
| 1980 - 1985 | Buick | Riviera | Base | ||
| 1981 - 1981 | Buick | Riviera | T-Type | ||
| 1982 - 1982 | Buick | Riviera | Limited Edition | ||
| 1983 - 1983 | Buick | Riviera | XX Anniversary Edition | ||
| 1983 - 1985 | Buick | Riviera | Luxury | ||
| 1991 - 1995 | Buick | Roadmaster | Estate Wagon | ||
| 1992 - 1995 | Buick | Roadmaster | Limited | ||
| 1992 - 1995 | Buick | Roadmaster | Base | ||
| 1987 - 1992 | Cadillac | Brougham | Base | ||
| 1992 - 1996 | Cadillac | Commercial Chassis | Brougham | ||
| 1994 - 1996 | Cadillac | Commercial Chassis | Base | ||
| 1980 - 1980 | Cadillac | Eldorado | Cabriolet | ||
| 1980 - 1980 | Cadillac | Eldorado | Biarritz | ||
| 1980 - 1980 | Cadillac | Eldorado | Base | ||
| 1986 - 1986 | Cadillac | Fleetwood | Brougham | ||
| 1993 - 1996 | Cadillac | Fleetwood | Brougham | ||
| 1993 - 1996 | Cadillac | Fleetwood | Base | ||
| 1980 - 1980 | Cadillac | Seville | Elegante | ||
| 1980 - 1980 | Cadillac | Seville | Base | ||
| 2006 - 2009 | Cadillac | STS | V | ||
| 2006 - 2009 | Cadillac | XLR | V | ||
| 1980 - 1982 | Checker | Marathon | Deluxe | ||
| 1980 - 1982 | Checker | Marathon | Base | ||
| 1987 - 1994 | Chevrolet | Blazer | Silverado | ||
| 1987 - 1987 | Chevrolet | Blazer | Custom Deluxe | ||
| 1988 - 1991 | Chevrolet | Blazer | Scottsdale | ||
| 1992 - 1993 | Chevrolet | Blazer | Cheyenne | ||
| 1994 - 1994 | Chevrolet | Blazer | Silverado Sport | ||
| 1994 - 1994 | Chevrolet | Blazer | Base | ||
| 1980 - 1986 | Chevrolet | C10 | Silverado | ||
| 1980 - 1986 | Chevrolet | C10 | Scottsdale | ||
| 1980 - 1980 | Chevrolet | C10 | Custom Deluxe | ||
| 1980 - 1981 | Chevrolet | C10 | Cheyenne | ||
| 1980 - 1980 | Chevrolet | C10 | Big Ten | ||
| 1981 - 1981 | Chevrolet | C10 | Deluxe | ||
| 1981 - 1986 | Chevrolet | C10 | Custom | ||
| 1980 - 1980 | Chevrolet | C10 Suburban | Silverado | ||
| 1980 - 1980 | Chevrolet | C10 Suburban | Scottsdale | ||
| 1980 - 1980 | Chevrolet | C10 Suburban | Custom Deluxe | ||
| 1981 - 1981 | Chevrolet | C10 Suburban | Deluxe | ||
| 1981 - 1986 | Chevrolet | C10 Suburban | Custom | ||
| 1982 - 1986 | Chevrolet | C10 Suburban | Silverado | ||
| 1982 - 1982 | Chevrolet | C10 Suburban | Scottsdale | ||
| 1984 - 1986 | Chevrolet | C10 Suburban | Scottsdale | ||
| 1988 - 1998 | Chevrolet | C1500 | Silverado | ||
| 1988 - 1992 | Chevrolet | C1500 | Scottsdale | ||
| 1988 - 1998 | Chevrolet | C1500 | Cheyenne | ||
| 1990 - 1998 | Chevrolet | C1500 | WT | ||
| 1994 - 1997 | Chevrolet | C1500 | Base | ||
| 1999 - 1999 | Chevrolet | C1500 | LS | ||
| 1992 - 1994 | Chevrolet | C1500 Suburban | Silverado | ||
| 1992 - 1995 | Chevrolet | C1500 Suburban | Base | ||
| 1995 - 1995 | Chevrolet | C1500 Suburban | LT | ||
| 1995 - 1995 | Chevrolet | C1500 Suburban | LS | ||
| 1980 - 1986 | Chevrolet | C20 | Silverado | ||
| 1980 - 1986 | Chevrolet | C20 | Scottsdale | ||
| 1980 - 1980 | Chevrolet | C20 | Custom Deluxe | ||
| 1980 - 1981 | Chevrolet | C20 | Cheyenne | ||
| 1981 - 1981 | Chevrolet | C20 | Deluxe | ||
| 1981 - 1986 | Chevrolet | C20 | Custom | ||
| 1980 - 1980 | Chevrolet | C20 Suburban | Silverado | ||
| 1980 - 1980 | Chevrolet | C20 Suburban | Scottsdale | ||
| 1980 - 1980 | Chevrolet | C20 Suburban | Custom Deluxe | ||
| 1981 - 1981 | Chevrolet | C20 Suburban | Deluxe | ||
| 1981 - 1986 | Chevrolet | C20 Suburban | Custom | ||
| 1982 - 1986 | Chevrolet | C20 Suburban | Silverado | ||
| 1982 - 1982 | Chevrolet | C20 Suburban | Scottsdale | ||
| 1984 - 1986 | Chevrolet | C20 Suburban | Scottsdale | ||
| 1988 - 1998 | Chevrolet | C2500 | Silverado | ||
| 1988 - 1992 | Chevrolet | C2500 | Scottsdale | ||
| 1988 - 1998 | Chevrolet | C2500 | Cheyenne | ||
| 1994 - 1995 | Chevrolet | C2500 | WT | ||
| 1994 - 1997 | Chevrolet | C2500 | Base | ||
| 1998 - 1998 | Chevrolet | C2500 | WT | ||
| 1999 - 1999 | Chevrolet | C2500 | LS | ||
| 1999 - 1999 | Chevrolet | C2500 | Base | ||
| 1992 - 1994 | Chevrolet | C2500 Suburban | Silverado | ||
| 1992 - 1995 | Chevrolet | C2500 Suburban | Base | ||
| 1995 - 1995 | Chevrolet | C2500 Suburban | LT | ||
| 1995 - 1995 | Chevrolet | C2500 Suburban | LS | ||
| 1980 - 1986 | Chevrolet | C30 | Silverado | ||
| 1980 - 1986 | Chevrolet | C30 | Scottsdale | ||
| 1980 - 1980 | Chevrolet | C30 | Custom Deluxe | ||
| 1980 - 1981 | Chevrolet | C30 | Cheyenne | ||
| 1981 - 1981 | Chevrolet | C30 | Deluxe | ||
| 1981 - 1986 | Chevrolet | C30 | Custom | ||
| 1988 - 1995 | Chevrolet | C3500 | Silverado | ||
| 1988 - 1992 | Chevrolet | C3500 | Scottsdale | ||
| 1988 - 1995 | Chevrolet | C3500 | Cheyenne | ||
| 1994 - 1995 | Chevrolet | C3500 | Base | ||
| 1980 - 1987 | Chevrolet | Camaro | Z28 | ||
| 1980 - 1980 | Chevrolet | Camaro | Rally Sport | ||
| 1980 - 1986 | Chevrolet | Camaro | Berlinetta | ||
| 1980 - 1980 | Chevrolet | Camaro | Base | ||
| 1981 - 1987 | Chevrolet | Camaro | Sport | ||
| 1982 - 1982 | Chevrolet | Camaro | Z28 Indianapolis 500 Pace Car | ||
| 1985 - 1990 | Chevrolet | Camaro | Iroc-Z | ||
| 1987 - 1987 | Chevrolet | Camaro | LT | ||
| 1988 - 1988 | Chevrolet | Camaro | Base | ||
| 1989 - 1992 | Chevrolet | Camaro | RS | ||
| 1991 - 1992 | Chevrolet | Camaro | Z28 | ||
| 1992 - 1992 | Chevrolet | Camaro | Z28 Heritage Edition | ||
| 1992 - 1992 | Chevrolet | Camaro | RS Heritage Edition | ||
| 1980 - 1980 | Chevrolet | Caprice | Classic Sport | ||
| 1980 - 1981 | Chevrolet | Caprice | Classic Landau | ||
| 1980 - 1996 | Chevrolet | Caprice | Classic | ||
| 1981 - 1982 | Chevrolet | Caprice | Classic Estate | ||
| 1986 - 1990 | Chevrolet | Caprice | Classic Brougham | ||
| 1986 - 1992 | Chevrolet | Caprice | Base | ||
| 1987 - 1990 | Chevrolet | Caprice | Classic LS Brougham | ||
| 1991 - 1993 | Chevrolet | Caprice | Classic LTZ | ||
| 1993 - 1994 | Chevrolet | Caprice | Classic LS | ||
| 1991 - 1994 | Chevrolet | Commercial Chassis | Base | ||
| 1980 - 1982 | Chevrolet | Corvette | Base | ||
| 1984 - 1991 | Chevrolet | Corvette | Base | ||
| 1986 - 1986 | Chevrolet | Corvette | Indianapolis 500 Pace Car | ||
| 1988 - 1988 | Chevrolet | Corvette | 35th Anniversary Edition | ||
| 1980 - 1987 | Chevrolet | El Camino | SS | ||
| 1980 - 1981 | Chevrolet | El Camino | Royal Knight | ||
| 1980 - 1987 | Chevrolet | El Camino | Base | ||
| 1981 - 1986 | Chevrolet | El Camino | Conquista | ||
| 1996 - 2002 | Chevrolet | Express 1500 | LS | ||
| 1996 - 2002 | Chevrolet | Express 1500 | Base | ||
| 2001 - 2002 | Chevrolet | Express 1500 | LT | ||
| 1996 - 2002 | Chevrolet | Express 2500 | LS | ||
| 1996 - 2002 | Chevrolet | Express 2500 | Base | ||
| 1980 - 1995 | Chevrolet | G10 | Sportvan | ||
| 1980 - 1995 | Chevrolet | G10 | Chevy Van | ||
| 1980 - 1995 | Chevrolet | G10 | Beauville | ||
| 1981 - 1984 | Chevrolet | G10 | Bonaventure | ||
| 1983 - 1983 | Chevrolet | G10 | Base | ||
| 1986 - 1987 | Chevrolet | G10 | Bonaventure | ||
| 1980 - 1995 | Chevrolet | G20 | Sportvan | ||
| 1980 - 1981 | Chevrolet | G20 | Nomad | ||
| 1980 - 1995 | Chevrolet | G20 | Chevy Van | ||
| 1980 - 1995 | Chevrolet | G20 | Beauville | ||
| 1983 - 1984 | Chevrolet | G20 | Bonaventure | ||
| 1980 - 1996 | Chevrolet | G30 | Sportvan | ||
| 1980 - 1996 | Chevrolet | G30 | Hi-Cube | ||
| 1980 - 1996 | Chevrolet | G30 | Chevy Van | ||
| 1980 - 1996 | Chevrolet | G30 | Beauville | ||
| 1983 - 1984 | Chevrolet | G30 | Bonaventure | ||
| 1980 - 1980 | Chevrolet | Impala | Sport | ||
| 1980 - 1985 | Chevrolet | Impala | Base | ||
| 1981 - 1982 | Chevrolet | Impala | Estate | ||
| 1994 - 1996 | Chevrolet | Impala | SS | ||
| 1980 - 1980 | Chevrolet | K10 | Custom Deluxe | ||
| 1980 - 1981 | Chevrolet | K10 | Cheyenne | ||
| 1980 - 1986 | Chevrolet | K10 | Scottsdale | ||
| 1980 - 1986 | Chevrolet | K10 | Silverado | ||
| 1981 - 1986 | Chevrolet | K10 | Custom | ||
| 1981 - 1981 | Chevrolet | K10 | Deluxe | ||
| 1980 - 1980 | Chevrolet | K10 Suburban | Custom Deluxe | ||
| 1980 - 1980 | Chevrolet | K10 Suburban | Scottsdale | ||
| 1980 - 1980 | Chevrolet | K10 Suburban | Silverado | ||
| 1981 - 1986 | Chevrolet | K10 Suburban | Custom | ||
| 1981 - 1981 | Chevrolet | K10 Suburban | Deluxe | ||
| 1982 - 1982 | Chevrolet | K10 Suburban | Scottsdale | ||
| 1982 - 1983 | Chevrolet | K10 Suburban | Silverado | ||
| 1984 - 1986 | Chevrolet | K10 Suburban | Scottsdale | ||
| 1985 - 1986 | Chevrolet | K10 Suburban | Silverado | ||
| 1988 - 1998 | Chevrolet | K1500 | Cheyenne | ||
| 1988 - 1992 | Chevrolet | K1500 | Scottsdale | ||
| 1988 - 1998 | Chevrolet | K1500 | Silverado | ||
| 1990 - 1998 | Chevrolet | K1500 | WT | ||
| 1991 - 1991 | Chevrolet | K1500 | Sport | ||
| 1994 - 1997 | Chevrolet | K1500 | Base | ||
| 1999 - 1999 | Chevrolet | K1500 | LS | ||
| 1992 - 1995 | Chevrolet | K1500 Suburban | Base | ||
| 1992 - 1994 | Chevrolet | K1500 Suburban | Silverado | ||
| 1995 - 1995 | Chevrolet | K1500 Suburban | LS | ||
| 1995 - 1995 | Chevrolet | K1500 Suburban | LT | ||
| 1980 - 1981 | Chevrolet | K20 | Cheyenne | ||
| 1980 - 1980 | Chevrolet | K20 | Custom Deluxe | ||
| 1980 - 1986 | Chevrolet | K20 | Scottsdale | ||
| 1980 - 1983 | Chevrolet | K20 | Silverado | ||
| 1981 - 1986 | Chevrolet | K20 | Custom | ||
| 1981 - 1981 | Chevrolet | K20 | Deluxe | ||
| 1985 - 1986 | Chevrolet | K20 | Silverado | ||
| 1980 - 1980 | Chevrolet | K20 Suburban | Custom Deluxe | ||
| 1980 - 1980 | Chevrolet | K20 Suburban | Scottsdale | ||
| 1980 - 1980 | Chevrolet | K20 Suburban | Silverado | ||
| 1981 - 1986 | Chevrolet | K20 Suburban | Custom | ||
| 1981 - 1981 | Chevrolet | K20 Suburban | Deluxe | ||
| 1982 - 1982 | Chevrolet | K20 Suburban | Scottsdale | ||
| 1982 - 1983 | Chevrolet | K20 Suburban | Silverado | ||
| 1984 - 1986 | Chevrolet | K20 Suburban | Scottsdale | ||
| 1985 - 1986 | Chevrolet | K20 Suburban | Silverado | ||
| 1988 - 1995 | Chevrolet | K2500 | Cheyenne | ||
| 1988 - 1992 | Chevrolet | K2500 | Scottsdale | ||
| 1988 - 1995 | Chevrolet | K2500 | Silverado | ||
| 1994 - 1995 | Chevrolet | K2500 | Base | ||
| 1994 - 1995 | Chevrolet | K2500 | WT | ||
| 1998 - 1998 | Chevrolet | K2500 | Cheyenne | ||
| 1998 - 1998 | Chevrolet | K2500 | Silverado | ||
| 1998 - 1998 | Chevrolet | K2500 | WT | ||
| 1992 - 1995 | Chevrolet | K2500 Suburban | Base |
WARNING: Cancer & Reproductive Harm www.p65warnings.ca.govFor more information on COMP Cams part number 12-601-20, you can visit the official COMP Cams website.
